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In a reactive dye, a chromophore (an atom or group whose presence is responsible for the colour of a compound) contains a substituent that reacts with the substrate. Reactive dyes have good fastness properties owing to the covalent bonding that occurs during dyeing. Reactive dyeing is the most important method for coloring cellulose fibers.
Reactive dye printing is a method of printing fabrics using reactive dye incorporated into a paste or wax including components such as sodium alginate gum, soda ash, urea and kerosin. Typically, the dye is dried at 130 degrees and cured at 180 degrees to permanently bond it, and the fabric later treated with a softener for better hand feel.
Reactive red 120 292775 diazo 61951-82-4: Remazol Brilliant Blue R: Reactive blue 19 61200 anthraquinone 2580-78-1: Rhodamine 123: rhodamine 62669-70-9: Rhodamine 6G: Basic red 1 45160 rhodamine 989-38-8: Rhodamine B: Basic violet 10 45170 rhodamine 81-88-9: Rhamnazin: 75700 natural 552-54-5: Rhamnocitrin Kaempferol 7-O-methyl ether Natural ...
Vinyl sulfone dyes are reactive dyes comprising a vinyl sulfone group as reactive group (a fiber-bonding site of the reactive dye, "reactive hook"). Due to the relatively high reactivity of the vinyl sulfone group with water (residual moisture, air humidity), it is present in many commercial products in a protected form.
The covalent bonds that attach reactive dye to natural fibers make them among the most permanent of dyes. "Cold" reactive dyes, such as Procion MX, Cibacron F, and Drimarene K, are very easy to use because the dye can be applied at room temperature. Reactive dyes are by far the best choice for dyeing cotton and other cellulose fibers at home or ...
reactive dye Reactive dyes are a class of synthetic dyes that first appeared commercially in 1956, after their invention in 1954 by Rattee and Stephens at the Imperial Chemical Industries Dyestuffs Division site in the United Kingdom. Reactive dyes are used primarily to dye natural fibers and cellulose fibers such as rayon. [39] resist dyeing
The method exploits the properties of reactive dyes, which are also applicable at room temperature. [4] Cotton can be dyed with a variety of dyes, although reactive dye is the most prevalent. Active groups in these dyes form covalent bonds with cotton's hydroxy groups through substitution and/or addition. The CPB method doesn't use salt or ...
By replacing the bromine substituent with an aliphatic or aromatic amine, vibrant blue dyes are obtained. [8] For example, bromamic acid can be condensed with 3-(2-hydroxyethylsulfonyl)-aniline (7) to form the vibrant blue dye (8) (oxysulfone blue), from which the reactive dye C.I. Reactive Blue 19 is obtained after esterification with sulfuric ...